added update check, save set path

pkg/utils/prefs.go

@@ -0,0 +1,50 @@
+package utils
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+)
+
+type UserPrefs struct {
+	SuppressedUpdateVersion string `json:"suppressed_update_version"`
+	TurtleWoWPath           string `json:"turtlewow_path"`
+	CrossOverPath           string `json:"crossover_path"`
+}
+
+func getPrefsPath() (string, error) {
+	dir, err := os.UserConfigDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(dir, "TurtleSilicon", "prefs.json"), nil
+}
+
+func LoadPrefs() (*UserPrefs, error) {
+	path, err := getPrefsPath()
+	if err != nil {
+		return nil, err
+	}
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return &UserPrefs{}, nil // default prefs if not found
+	}
+	var prefs UserPrefs
+	if err := json.Unmarshal(data, &prefs); err != nil {
+		return &UserPrefs{}, nil
+	}
+	return &prefs, nil
+}
+
+func SavePrefs(prefs *UserPrefs) error {
+	path, err := getPrefsPath()
+	if err != nil {
+		return err
+	}
+	os.MkdirAll(filepath.Dir(path), 0755)
+	data, err := json.MarshalIndent(prefs, "", "  ")
+	if err != nil {
+		return err
+	}
+	return os.WriteFile(path, data, 0644)
+}